JP2596974Y2 - gasket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing material for sealing a cover member and a mating member in an engine mounted on an automobile or the like, and more specifically, to a shape of a gasket formed from the elastic body and an insert material. Regarding improvement.

[0002]

2. Description of the Related Art Conventionally, a gasket for sealing a cover member such as a head cover or an oil pan of an engine mounted on an automobile or the like is an annular gasket formed of an elastic material such as synthetic rubber and having a square or round cross-sectional shape. It has been known. These annular gaskets are press-fitted between the members by fasteners such as bolts, and are brought into close contact with each other by their compressive elastic deformation to exert the required sealing action.

[0003]

However, such an annular gasket cannot meet the recent demands for weight reduction and various simple mounting requirements. That is, the gasket made of a material having a sufficient mass and improved deformation adhesion has a great difficulty in handling due to its softness, for example, transport or attachment to a cover member. A simpler and safer mounting structure has been demanded because it may lead to more serious damage. Further, in recent years, there has been a demand for automatically mounting a gasket to a cover member on an engine assembly line. Hereinafter, this will be described in detail with reference to the drawings.

In such a situation, an insert material 6 is embedded in a non-sealed portion of the gasket main body 5 as shown in FIG. Gaskets provided with a certain degree of rigidity have been proposed. However, this gasket cannot exhibit any other useful effect except to maintain the shape by embedding the insert material 6, and the insert material 6 is attached in a fragmentary manner with a reduced sealing portion, and the gasket is mounted on the raised arc portion b. However, it has a disadvantage that it does not have any effective components and thus has an adverse effect on the sealing action. The present invention has been made in view of the above-described drawbacks, and has as its object to provide a gasket that has improved handleability and sealing performance.

[0005]

The present invention will be described with reference to the drawings . As shown in FIG. 4 , the present invention is mounted between a cover member 1 such as an automobile engine and a mating member 2, and 4 is a gasket made of a sealing material such as a synthetic rubber or a synthetic resin, etc.
The cover member 1 and the mating member 2 are provided with a flat portion a and a raised arc portion b which engage with each other, and the gasket is sufficiently embedded in the elastic body 3 and the entire circumference of the elastic body 3 as shown in FIG. comprising an insert member 4 having rigidity, the thickness of the raised arcuate portion 4b in the insert material 4 or raised base
It is characterized in that it is arranged in a thin gradually deformed shape c from the top to the top of the arc portion .

[0006]

The present invention has the following excellent functions with the above structure. When the gasket of the present invention is mounted and tightened between the cover member 1 and the mating member 2 (often a cylinder head cover and a cylinder head or an oil pan and a cylinder block) as shown in FIG. 4 , the elastic body 3 is compressed and deformed. The compression amount of the flat portion a is maintained at an appropriate surface pressure. At this time, the protruding arc portion b is gradually reduced in thickness of the insert material 4b.
Due to the deformation c , the mass of the insert 4 in the middle is
The mass of the elastic body 3 is inevitably increased because it is reduced.
The protruding base has a mass of the insert 4 opposite to the above.
Multi Kunar the elastic body 3 has a small mass. This bump
When the tightening pressure is applied by the elastic body 3 having a small mass, the base exerts rebound resilience immediately to ensure an effective seal surface pressure with a small tightening pressure. It has a structure to obtain the same tightening surface pressure as the part. Of course, the middle of the raised arc b is the elasticity described above.
Since clamping pressure close to the flat portion a by securing the body 3 is obtained, the elastic body 3 of the part as well as the flat portion a
Sufficient surface pressure is obtained , and it is possible to respond to deformation or distortion of the fastening members 1 and 2 with a margin. The rigidity of the insert 4 allows the gasket of the present invention to maintain its overall shape accurately.

[0007]

EXAMPLES To implement the present invention, instead of disposing a raised arcuate portion 4b of the insert material 4 in the thickness gradually deformed shape c, the compression direction face of the raised arcuate portion 4b as shown in FIGS. 2 and 3 To
A bead that gradually changes in the middle of an arc from the base of the protrusion
It is also possible to arrange d , the thickness gradually deformed
As in the case of c , the mass of the elastic body 3 can be adjusted by the bead d, and an adjusting effect of the elastic repulsion can be obtained.

In the formation of the insert material 4, molding from a material such as a hard synthetic resin or synthetic rubber is advantageous in terms of moldability and cost. However, a lightweight inorganic material, a wooden material, a metal material, or the like is used. It can also be formed from, and can respond variously depending on the required performance. The insert material 4 has a shape having an exposed portion as shown in the figure, and has an extended portion or a hole in a main portion in order to improve storage or automatic conveyance by a machine and automatic mounting to the cover member 1. Etc. (not shown) can also be provided.

[0009]

[Effect of the Invention] According to the present invention, a sufficient tightening repulsive force can be arranged even in a portion where it is difficult to secure a necessary tightening pressure of the raised arc portion of the gasket, and the entire peripheral surface of the sealing surface is in a good tightening state. Demonstrates high sealing performance. Due to its great rigidity, the insert material 4 accurately maintains the shape of the gasket, and thus enables automatic mechanical assembly to the cover member 1 in an engine assembly line.

[Brief description of the drawings]

FIG. 1 is a partial front view showing an embodiment of the present invention.

FIG. 2 is a schematic front view showing another embodiment of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view showing a state where the present invention is mounted.

FIG. 5 is a sectional view of a conventional structure not using the present invention.
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[Explanation of symbols]

a Flat portion b Raised arc portion 1 Cover member 2 Mating member 3 Elastic body 4 Insert material 4a Flat portion of insert material 4b Raised arc portion of insert material c Thickness gradually deformed d-bead

Claims (2)

(57) [Scope of request for utility model registration] 1. An elastic body 3 mounted between a cover member 1 having a flat portion a and a raised arc portion b and a mating member 2 and compressed by the two members 1 and 2, and the entire elastic body 3 Week
A gasket made from the insert material 4 which is embedded in the thickness of the raised arcuate portion 4b in the insert material 4 Takashi
A gasket, wherein the gasket is disposed in a thin gradually deformed shape c from a base portion to a vertex of an arc portion . Wherein over the apex of the arcuate portion from the raised base to the compression Direction surface of the raised arcuate portion 4b in the insert material 4
2. The gasket according to claim 1, wherein a bead d is formed which is thin and gradually changed and protrudes.